// IDENTIFY FAILED TASKS - TRY TO IDENTIFY WHICH DATE SUPPLIED TO WEB SERVICE FAILED.
foreach (var failedTask in failedTasks)
{
var failedMethod = failedTask.MethodSignature; //<---- here is what i want to do. Property 'MethodSignature' does not exist - this is merely an example of what I am attempting to do.
}

UPDATE -
Some of the comments suggest people having heartburn over the use of the phrase Method Signature. What I mean by method signature is actually method signature including input parameter values. As such I have altered the question title to reflect more accurately what I am seeking. My example it contrived and simple. It does not reflect my real-world problem. But my question remains - when viewing the list of failed tasks how do I determine the actual method invoked as part of the task. I cannot seem to find any properties of the task that describe what method caused the failure.